Amazon - Successful Head and Shoulders.

After a successful Head and Shoulders pattern (inverted), it seems the bulls are going to take a rest today. The volume has been decreasing in the last seasons, indicating there’s a top here.
Isn’t time to buy, neither to short, but I would sell my positions. The prices could drop to the blue line (previous top) without spoil the bull tendency, but I would wait for a better opportunity to buy Amazon.